Sabtu, 18 Februari 2012

Western Digital Scorpio Blue 500 GB Bulk/OEM Hard Drive 2.5 Inch, 8 MB Cache, 5400 RPM SATA II WD5000BEVT (Personal Computers) tagged "laptop" 60 times

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202 of 206 people found the following review helpful: 5.0 out of 5 stars Excellent Hard Drive for PS3 and Laptops, June 10, 2009 First of all, there used to be two product listings for this hard drive, both identical except for the ASIN numbers. One was listed as the stand alone, the other was listed in the Western Digital Scorpio Blue page with the pull-down menu that has all the different sized drives in the series. I have no idea what the difference is. Amazon, for some reason, took down the 500 GB listing from the pull-down menu and it now has it's own page. Odd they chose that direction. It would have made more sense to remove the individual listing.

Ok, this is for PS3 owners/upgraders. This drive fits the PS3 wonderfully and runs nice and cool with no issues. For the price you can't go wrong. I have the 40 GB PS3 (Spider Man 3 bundle) and have the data (saves + install) of about 10 games and I was running out of space. I did a lot of research of the various SATA 2.5" laptop hard drives available. I researched all the various brands and compared reviews and prices vs size. I came to the conclusion that a 500 GB drive for $100 is a steal given the extra space gained, so that's the direction I went. Of all the brands, the Western Digital Scorpio Blue series seemed to have the most positive reviews all over with the least amount of reviews stating drive failure, so that's the one I chose.

Installing was extremely easy after backing up my data. The longest part of the whole procedure was backing up and restoring the data. I won't go into details, but I do recommend the app another reviewer used to format an external drive larger than 32GB in the FAT32 file system. It's called "fat32format". It works extremely well and extremely fast (less than 4 seconds for a 120GB external drive). Just follow the directions and you're good. I did this because in order for the PS3 to recognize the external drive it has to be formatted in the FAT32 file system. As for the procedure of upgrading the PS3, just google "upgrade PS3 hard drive" and you'll get tons of tutorials and videos.

Now here's something important: A lot of people who upgraded their PS3's and saw xxx/465 GB free after upgrading are not realizing that this is not the fault of the PS3. You could put the same drive in a laptop and it will have the same 465GB. This is because manufacturers advertise a gigabyte as something different than what windows or the PS3 recognize. Manufacturers see a gigabyte (GB) as 1000 megabytes, and 1 megabyte (MB) as 1000 kilobytes (KB), when in actuality windows sees 1 MB as 1024 KB. So that's where the unaccounted lost space goes.

So as of now, my opinion is that this hard drive is a great choice for PS3 upgrades. If you don't want to drop a bill on the 500GB version they also have the Scorpio Blues in smaller sizes for reduced prices. I like this hard drive so much I may replace my laptop hard drive with one.

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180 of 184 people found the following review helpful: 5.0 out of 5 stars Great upgrade for the MacBook Aluminum..., January 16, 2009 This review is from: Western Digital Scorpio Blue 500 GB Bulk/OEM Hard Drive 2.5 Inch, 8 MB Cache, 5400 RPM SATA II WD5000BEVT (Personal Computers) I bought the new MacBook Aluminum (13" - Late 2008), with the 160GB hard drive, which quickly fell short to my storage demands. While on the market for an upgrade hard drive, I came across the WD 500GB Scorpio Blue and hesitant at first (I could not find anywhere a post which would guarantee that it would work with my MB), I decided to go for it. Upon receiving my hard drive, I ran the Time Machine on my MB, switched the OEM hard drive for this beauty (it took about 15 mins.), installed Leopard from the DVD that came with my MB, and then restored from the most recent TM backup (installing the OS took about 10 mins, and restoring the backup took about 2 hrs - it was a 140GB backup!). So far, I've had no problems whatsoever using the drive. It is very quiet, does not heat up excesively (comparable actually to the original hard drive), and now I have a MB with a 500GB drive!!!

I am extremely satisfied with this drive, and would definitely recomend it to any MB/MBPro owner who wants to upgrade the hard drive.

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Update: July 19th, 2010

I've been using this hard drive for over a year and a half now, without any problems whatsoever. Quite drive, no difference in power consumption, performs great! Actually, I am thinking about replacing it with the new 1TB Scorpio, especially because my digital movie collection is growing really fast (I'm ripping my own DVD's so I can view them in my LCD TV, my iPhone, my iPod or my MBP). Great drives, and to be honest, I've never heard of any freezing, beach balls, or any other problems before or after I bought my drive. Great product...still give it 5 stars!

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121 of 128 people found the following review helpful: 5.0 out of 5 stars Joining the Choir - It's the Goodest, September 11, 2008 PLUSES: It's large, quiet, fast. It easily and perfectly fits where a 20-40-60-80 GB, 2.5" SATA drive would, including in a PS3.

MINUSES: You may be able to find larger drives but not everyone may need more.

Of course, it's no longer 'the biggest' but I knew that a couple of months ago, when I upgraded my PS3. I also figured that, since I have no plans of storing a movie library, 320 GB would carry me for the next couple of years. After that, it's likely that I'd be buying the next generation game/multimedia machine.

Advice to the PS3 upgraders from someone who, after some hesitation, actually did it:
- Go for the highest capacity. If it's a 2.5" SATA and you can afford it you should probably go with it. I already replaced my original PS3 drive with a 320GB but my formerly 60GB laptop has a 500GB 2.5" WD SATA now.
- If you need to format this drive or any drive to Fat32, the best utility I found was FAT32FORMAT.EXE - Google and you shall find it out there. I'm not reviewing the formatter utility but I can tell you that it does a drive in less than 10 seconds AND it works on Vista.
- It helps to have a 60-80 USB-connected drive handy to backup your PS3 content before upgrading. With one of these as the backup device, the PS3 fully restore EVERYTHING, including whatever copywrited or protected objects, such as, in my case the PS2 memory cards emulations.
_______________________________________

Note (March 12, 2009)
The Western Digital Scorpio Blue 500 GB Bulk/OEM Hard Drive 2.5 Inch, 8 MB Cache, 5400 RPM SATA II WD5000BEVT seems to be the way to go these days. I like WD and the 500GB is selling now for less than I paid for the 320GB. I actually helped a couple of friends upgrade with this drive and it was quick and easy.

Note 2: (April 8, 2009)
The review above was for the 320GB, which I used to upgrade my PS3. I just ordered the 500GB because life became almost unbearable with a 60GB on my laptop. I am planning to swap the drives without actually reinstalling the OS and the apps with help from Acronis True Image Home 2009 PC Backup & Recovery.

Note 3: (April 12, 2009) - Laptop Upgrade
My 2 year old Thinkpad T60 came with a wimpy 60GB SATA drive. I needed the ability to upgrade to the much larger 500GB and do it without having to reinstall the OS, apply the service packs and then reinstall and configure 100 different little apps.

Acronis True Image Home 2009 PC Backup & Recovery allowed me to do all of the above in about one hour. Its Utilities section has a 'clone' option that would copy EVERYTHING, including the Master Boot Record/Sector (MBR) from the puny 60GB drive unto the 500GB while allowing me to control the size of the active partition - this while the 500GB was connected through a USB wire and the laptop booted off the program's CD.

Once the operation completed (50 minutes) I simply removed the old 60GB drive off my laptop and replaced it with the 500GB drive. Once the laptop was turned back on it booted up happily, with a 200GB master partition and a 300GB second partition. There are 3 words that I have to use to describe the process: PERFECTION and COMPLETE SATISFACTION. This capability alone is worth the price of this product.

To my surprise, with the new drive, the Primary Hard Disk score as computed by Microsoft (right click on 'My computer' then select 'Properties') jumped from a decent 4.8 to an unexpected 5.7.

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Crucial 2GB 256Mx64PC2-5300 CT25664AC667 DDR2 200-Pin SODIMM Laptop Memory (Personal Computers) tagged "laptop" 74 times

Western Digital 320 GB Scorpio Black SATA 3 Gb/s 7200 RPM 16 MB Cache Bulk/OEM Notebook Hard Drive - WD3200BEKT (Personal Computers) tagged "laptop" 73 times

Antec USB-Powered Notebook Cooler (Personal Computers) tagged "laptop" 96 times

796 of 809 people found the following review helpful: 4.0 out of 5 stars Antec USB Notebook Cooler - Great Design, Decent Cooling, Best Value In Its Class!!!, August 29, 2007 This review is from: Antec USB-Powered Notebook Cooler (Personal Computers)
Antec's USB-Powered Notebook Cooler is a very good unit that is better than most alternatives. Cooling is essential for laptops. It can improve a computer's performance and useful life. No cooler will make your notebook ice cold, but this one will definitely lower the temperature. It works REGARDLESS of notebook design, and I will explain how.

The pros FAR OUTWEIGH the cons. I have added most of these cons after long term use. These are mostly nit-picky cons, and this unit is still a great value. That holds true for both the original unit and the updated design.

PROS
+ The plastic body and metal top are well designed for a solid feel
+ The nice aluminum top spreads heat very well and is durable
+ The USB cable is pass through with an extra USB port to connect other devices
+ The cable length is nice and short
+ There is a small compartment to tuck away the cable after use
+ The fans run VERY quietly at either high or low speeds
+ The rubber feet are solid and provide nice stability and grip
+ It now has surface holes for optional rubber pegs for more space to improve air-flow
+ The unit is stable enough that a well positioned laptop will sit flat and will not *rock* back and forth
+ Can also be used to cool AV components or to add air-flow around your HTPC
+ After using mine for several years and buying more as gifts, I can vouch for the durability
+ The 3 year warrantee that comes with the product gives you some comfort in the case the product does fail

CONS
- The fans and outer holes gather dust over time; just clean it with compressed air
- The USB power cord and base connector could be more durable, so handle with care
- The unit looks like air flows through the entire top, but it only flows through the 2 fans positioned in the center; It's more visible on the Antec Notebook Cooler (Pearl) version than the black and silver one
- The blue LED light may be too bright for some people, but it can easily be covered with electrical tape
- The cable may be too short for those without left side USB ports; purchase a USB extender cable
- The cooler is very thick, so you need a big laptop bag if you want to bring it with you
- The surface pegs can fall out if not inserted all the way; just twist when you insert them to lock them in
- The unit's smaller size makes it ideal for 14 - 16 inch laptops; for larger units you will need to use the surface pegs
- The item frequently goes out of stock and has price changes
- The list price of $50 seems unreasonable

How it Works

This cooler works in several ways. First of all, the fans create air flow under the laptop that will draw the heat away from the bottom of the laptop and onto the cooler surface. This works regardless of whether there is a small or large space.

In some cases your laptop may flex so that the cooler will slightly touch the bottom of your laptop. That's ok because the aluminum surface attracts and spreads out the heat to cool your laptop down. Most laptops can benefit from this *heat spreading*.

The fans are designed to draw heat from the aluminum away from the laptop. That is why the fans blow the way they do. They still circulate air under the laptop. You can feel the air with your hand if you hold it over the cooler. If the air blew the other way it would blow dust and heat into your laptop vents.

Contrary to some comments, this cooler cannot create a vacuum under your laptop. Similarly this cooler will not *fight* for air with your laptop fans. The air intake for both your laptop and the cooler is coming from the surrounding area. Unless you are using this cooler while orbiting the earth in a space station, there is plenty of air to allow for a few small fans to pull air in more than one direction. The aluminum will still pull heat from the bottom and spread it away from the unit. And the fans will still pull air over the surface of the laptop's base to cool it.

Common Issues and Solutions

1.) If the LED light bothers you, you can cover it with a small piece of electrical tape. I sleep with it on all the time. You can see it in the dark but it doesn't bother me.

2.) The little door that holds the USB power wire has 2 clips on the back and a button on the front.. Make sure you have pulled that release button forward again. You can just clip it back into place.

3.) The cooler can be used on your lap but it works much better with something like the Jumbo Lap Desk. Wood lap desks don't flex like the plastic ones but tend to cost more, so you have to see what works for you. Even Belkin's CushTop Notebook Stand might be an option.

4.) The newer units have added surface pegs, but they can fall out. Make sure you have fully twisted them when you insert them. That will allow the pieces that hold them in place to fully rest on the inside of the cover so they won't fall out.

Comparing to the Competition

This unit has a more durable aluminum top, stronger plastic, ergonomic shape, and quieter fan than the competition. This unit is much better than the original Targus PA248U Notebook Chill Pad which was made of very flimsy and thin plastic. Targus created a newer Targus Notebook Cooling Chill Mat (AWE11US) with harder plastic and also a Targus AWE12US Notebook Chill Hub with extra USB ports. Neither has an aluminum top, and they still don't perform as well.

There are completely metal versions that are available like the Cooler Master NotePal Widescreen Notebook Cooler ( R9-NBC-AWAK ) designed for larger or wide-screen units. Most of those cost more and still have their own cons.

There are also stands and inclined holders designed to let more air flow beneath your laptop, like the Logitech Alto Express Notebook Stand or the Logitech Alto Connect Notebook Stand. Those will help a little but not as much as a fan. I personally don't like typing on inclined stands and only use them for docked laptops.

Conclusion

The list price is excessive, but this cooler is a great deal at $20 or less. This item is also frequently sold at brick and mortar stores with mail in rebates. I hate those so I just wait for it to go on sale here. At this point I have bought 4 for myself and several as gifts.

I hope that this information has been helpful and has shown why this cooler is good despite the imperfections. At the right price this unit can be a great value so definitely check it out.

Enjoy!

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126 of 130 people found the following review helpful: 5.0 out of 5 stars Better Than the Rest! (Based on My Tests), April 13, 2008 This review is from: Antec USB-Powered Notebook Cooler (Personal Computers) Most of laptop cooler/chill pads are made of PLASTIC and use fans that blow air TOWARDS the laptop. What impresses me about this product is that the cooling surface is made of ALUMINUM (just like the aluminum casing used to keep portable hard drives cool) and its fans PULL/SUCK HOT AIR AWAY from underneath the laptop. This method of REMOVING hot air is superior to blowing room temperature air at the laptop (it's also the same mechanism used by laptop/desktop internal fans).

MY TESTS: I compared the latest Targus high-speed chill mat (Model PA248U) to this one. After running the laptop for one hour on each, I noticed the surface of the laptop (keyboard, palm rest, touch pad, etc.) was the same in both cases (very cool). But there was a noticeable difference on left side of my laptop (where my Dell's internal fan exhausts warm air). With the Targus, there was noticeable amounts of warm air being exhausted by the laptop's internal fan. With the Antec, there was much less warm air being exhausted than the Targus. So the Antec does a superior job cooling the laptop since the laptop's internal fan was exhausting less hot air.

MINOR DETAILS: The Antec allows you to control the speed of the fan (high or low) while the Targus is fixed, presumably at high (and is rather noisy). The Targus does have a simple push on/off switch; the Antec does not (you have to unplug it for off). The Antec's USB cord is pass-through meaning Antec will NOT take us one USB slot (the Targus did not have this feature). The Antec has a very strong Blue LED light to indicate it is on (it could be helpful as an on/off indicator, but it is very annoying in low-light condition because it is very bright).

BOTTOM LINE: Because the cooling surface is made of aluminum and because the fans work to draw hot air away from the laptop (much like your laptop's internal fan), Antec is a superior product. Also, my simple tests showed that the laptop was cooler using Antec.

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Apple MacBook Pro MC374LL/A 13.3-Inch Laptop (OLD VERSION) (Personal Computers) tagged "laptop" 82 times

Logitech 720p Webcam Pro 9000 (Personal Computers) tagged "laptop" 104 times

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1,584 of 1,615 people found the following review helpful: 4.0 out of 5 stars Amazing Video Clarity; Troublesome Vista Support, October 12, 2007 Customer review from the Amazon Vine™ Program (What's this?) Length:: 1:15 Mins

The Logitech QuickCam Pro 9000 is one of the better webcams I have had the opportunity to use over the years. Its stylish design fits easily on top of my LCD screen, while its functionality and features continue to impress. However, Vista functionality can be an adventure at a few times.

First, let's talk about the good -- picture quality. Let me put it to you think way: This webcam works better than my high priced Sony Camcorder at picking up video in low-light settings. I was simply amazed the first time I used it in a room with compact flourescents in the middle of the night and had such remarkable clarity and picture quality. Logitech credits this ability with something they call RightLight technology (in the video review I get it backwards -- sorry Logitech!). Whatever you want to call it, it's one of the features that definitely makes this webcam stand above the rest.

Next, the optics themselves are impressive. The 9000 utilized Carl Zeiss optics and you can tell the difference between this webcam and others. If you want to find out what makes Carl Zeiss optics so good, I encourage you to do a quick internet search or visit Wikipedia to look it up. It's hard to describe in text how this optics setup helps -- this is definitely something you have to see to believe.

Overall, I found it worked well with all the major instant messaging applications -- AOL, Windows Live Messenger and Yahoo. It also worked very well as a stand-alone camera taking incredible video and decent still shots -- but remember, if you want to take a lot of still shots the quality you get from a product like this is fair at best compared to what you will get with a decent digital camera.

Now, let's talk about a few things that weren't so good about this webcam. The biggest struggle I had was with Windows Vista. Even though the box proclaims it is certified for Vista, I had numerous driver issues. The Logitech 9000 worked in Vista just fine, but for some reason at random intervals it wanted to re-install its drivers. One thing you should know if you purchase this camera is that when installing it you will want to make sure you have the installation program check for updates. I found there were two driver updates for the camera during install. However, even with these updates I continue to have that random re-installation issue.

The "helper application" that comes with the 9000 lets you do a lot of things -- such as configure the webcam, add effects, etc. Although I had no problem configuring it I never got the effects to work. However, this wasn't a big deal for me as I have no use for the special effects.

Overall, if you are looking for a quality webcam that can produce terrific results I highly recommend the Logitech QuickCam Pro 9000. Just be aware of potential Vista issues (which hopefully Logitech will solve). Other than that it's so easy to use even beginners to computers will be able to get it up and running in no time. A quality webcam at a good price considering all of its features.

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563 of 579 people found the following review helpful: 5.0 out of 5 stars Great Cam; Don't be afraid to play with the software settings!, December 16, 2008 Length:: 2:06 Mins

UPDATE: Uploaded new video around October-November 2010 and this video is current as of February 7th, 2011. LATEST SOFTWARE RELEASE IS BUGGY! Watch Video
Also, I use this webcam to film beauty related reviews on youtube.

For those of you who've had issue with this cam, or those who've heard bad things about this camera; watch the video. I'm no public speaker by any means, but I think it's worth watching so you can get the best out of your new or potentially new webcam.
UPDATE: LATEST Software is Buggy! Watch Video
If you didnt watch the video or want a summary of what I stated in the video, I'll restate the main points below:
1. Always install the appropriate drivers from their logitech site. Often, the drivers on the disc are outdated.
2. Open up the Logitech Quickcam Vision for Enterprises software either through Start>All Programs>Logitech or just click on the icon provided on the desktop if there is one.
3. Unclick both Rightlight Automatic Settings(the eye picture icon) and Automatic Settings for Gain and Exposure(the owl picture icon). You can all find this under the gears icon. You can then adjust the bars left to right (especially exposure and gain) accordingly.
4. Under the camera picture icon in the software, you can also adjust for manual/auto focus, brightness, contrast, color, and white balance.
Doing all of this will raise your picture frame rate and minimize any blurring from motion.
Don't ever worry how you'll mess the camera settings up. If you first don't succeed at what you want, you can always re-click auto settings and start all over. Personally, I find it kind of entertaining when I mess around with it!

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625 of 658 people found the following review helpful: 3.0 out of 5 stars For Mac and OS X, December 6, 2007 This review is for the benefit of Mac users, not Windows. I bought the Logitech QuickCam Pro 9000 and the Logitech QuickCam Ultra Vision to choose a web camera for an iMac G5 2.0GHz, the generation immediately before the G5 iMac with the built-in iSight camera. And I'm running Mac OS X 10.5.1, the most updated (to date) Leopard. There is currently a camera for sale at Apple retail stores that is labeled the Logitech QuickCam Ultra Vision MP, for Macs. It is the same hardware as the Ultra Vision and Ultra Vision SE for Windows; all the Ultra Vision cameras differ only in cosmetics, color--they're all the same hardware.

On a Mac, the cameras both run on the built-in Apple drivers. There are no Logitech drivers, no Logitech software. Therefore none of the Logitech special effects or light and sound management that the box lists work for Mac users. No autofocus, no RightLight2, no RightSound. Kind of a drag. In addition, there is no ability to manage color, light balance, etc., from any operating system software on the Mac or from Logitech. This is pure plug-and-play, and you get only the most basic functionality: The camera and microphone work (not sure about quality of sound on receiving end) to deliver picture and sound, neither tunable with what is in the box.

What the two cameras have in common is that they work for Mac users. According to what I've read, any camera that is labeled as Microsoft Windows Vista-compatible or UVC (USB Video Class) will work just as these do in Mac OS X, with this prereq: You have to have OS X 10.4.9 minimum. Tiger (OS X 10.4) is currently at 10.4.11; Leopard is at 10.5.1. Both will support video and sound on UVC cameras.

That said, the Pro 9000 and Ultra Vision differ in some significant ways. The focus on the Pro 9000 (P9K hereafter) is tighter than on the Ultra Vision (UV hereafter). The focus on the UV is comparatively lower in resolution; you can see jaggies on straight lines on either camera, but they're pretty visible on the UV, and you have to look for them on the P9K. I would say the P9K is definitely superior, and neither is as good as the iSight cameras built into any of the current Mac lines (but then, if you had a Mac with iSight, you wouldn't be reading this). The P9K's resolution is finer than the UV.

As to color I would say that if I could have a compromise between the two cameras, the UV and the Pro 9000, it would be better than either. The Pro 9000 color/exposure is a bit washed out; the UV is a bit dim. E.g., a blue pinpoint oxford shirt looks barely blue on the Pro 9000, and much more saturated on the UV. The entirety of the UV's color tilts heavily toward blue, while the Pro 9000 goes more toward yellow. (I would be curious to know if the color balance varies by model or by individual camera. I'd also love to see if other brands, say, Creative Labs, differ too.) Both cameras adjust to changing light, but in low light the Pro 9000 is not just a little but significantly better; in very low light, the UV nearly blacks out, while screen light is enough for the PK9 to deliver a passable image, albeit with low frame rate and lots and lots of motion blur.

Note that on a G5 or earlier (any non-Intel Mac), the support for iChat and PhotoBooth's effects is limited--specifically, they'll do the first two panels (color effects, including charcoal, Andy Warhol-ish, X-ray, B/W, sepia, and the pinch, swirl, and similar effects), but none of the backdrop effects, either still or moving.

I found both to work with iChat, PhotoBooth, Skype, and several of the shareware camera apps available. So I would say they work, period.

While neither Apple nor Logitech provides much more support for cameras, eCamm.com has a bevy of camera titles that provide extra power for web cameras on non-Intel Mac hardware. iGlasses, PowerBoost, and a couple other titles provide color tuning, restore some of the effects capabilities that PPC Macs don't get in iChat and PhotoBooth, and provide recordability with QuickTime output. They do good work. iGlasses provides some control over brightness, contrast, saturation, hue, gamma, sharpness, gain, white balance. I didn't find these to really improve the images on the P9K, but they did help the UV. Once you get a camera, you may want to get some of eCamm's software.

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Jumat, 20 Januari 2012

Tanah Mediteran

Apa Itu Tanah?

Sebelum mengetahui lebih jauh tentang tanah mediteran, alangkah baiknya Anda mengenal definisi tanah. Tanah adalah lapisan permukaan bumi yang memiliki fungsi sebagai berikut.

Secara fisik, berfungsi sebagai media tumbuh dan perkembangan akar tumbuhan serta menyediakan makanan, air, dan udara untuk tumbuh-tumbuhan. Secara kimiawi, berfungsi sebagai tempat untuk menyimpan dan menyuplai zat hara serta nutrisi yang diperlukan untuk pertumbuhan tanaman. Secara biologi, tanah menjadi tempat hidup bagi organisme-organisme yang keberadaannya membantu menyediakan zat hara dan zat-zat lain yang bermanfaat bagi pertumbuhan tanaman. 

Tanah tersusun dari beberapa komponen, yaitu bahan padat berupa mineral, bahan padat berupa organik, air, dan udara. Komposisi kandungan bahan pada tanah rata-rata 50% berupa bahan padatan (45% bahan mineral dan 5% bahan organik), 25% air, dan 25% udara.

Pembentukan tanah diawali oleh pelapukan batuan menjadi lunak membentuk regolith atau bahan tanah lalu lama-kelamaan berubah menjadi tanah. Proses pelapukan ini dipengaruhi oleh organisme, iklim (seperti curah hujan, sinar matahari), topografi, bahan induk, dan waktu.

Di daerah tropis, pelapukan batuan sangat dipengaruhi oleh suhu dan kelembapan udara. Interaksi berbagai faktor pembentuk tanah ini akan menghasilkan tanah dengan sifat-sifat berbeda. Jenis tanah bermacam-macam, antara lain tanah alfisol, aridisol, entisol, histosol, inceptisol, mollisol, oxisol, spodosol, ultisol, vertisol, dan lain-lain.

Tanah mediteran

Tanah mediteran adalah tanah yang terbentuk dari pelapukan batuan kapur dan bersifat tidak subur. Misalnya, bisa kita temukan pada tanah-tanah di Nusa Tenggara, Maluku, dan Jawa Tengah.

Jenis tanah ini berasal dari batuan kapur keras (limestone), yang pada umumnya tersebar terdapat di daerah beriklim subhumid, topografi karst, dan lereng vulkan dengan ketinggian di bawah 400 m.

Tanah ini berwarna cokelat, merah, atau kuning. Sementara itu, warna merah kuning pada tanah mediteran berada di daerah topografi karst yang dikenal dengan sebutan Terra Rossa.

Tanah mediteran yang berbahan induk batu kapur mempunyai nilai pH yang lebih tinggi dibanding dari yang berbahan induk batu pasir. PH tanah dapat dipengaruhi oleh beberapa faktor, yaitu bahan induk tanah, pengendapan, vegetasi alami, pertumbuhan tanaman, kedalaman tanah dan pupuk nitrogen.

Yang mrenjadi masalah utama dari jenis tanah mediteran adalah ketersediaan air dan tingginya pH tanah yang seringkali di atas 7. Tanah yang bersifat alkalis mengikat fosfat sehingga akan menjadi kendala bagi tanaman untuk tumbuh. Oleh karena itu, jenis tanah ini tidak cocok untuk dijadikan lahan pertanian.

Untuk mengembangkan komoditi pertanian, perlu dilihat jenis tanah sebelum mulai menanam. Ini penting untuk menentukan tingkat kesesuaian tanah dengan jenis tanaman yang akan ditanam. Di samping itu, zat hara yang dikandung jenis tanah ini hampir tidak ada.

Bagi Indonesia yang cukup banyak mengandalkan produk pertanian sebagai penunjang kehidupannya sehari-hari, keberadaan jenis tanah ini tidak banyak untungnya. Meskipun begitu, ada beberapa cara untuk mendapatkan manfaat ekonomi dari tanah jenis ini. Misalnya, menjadikannya sebagai bahan bangunan. Bahan kapur yang kokoh, berguna untuk membuat fondasi bangunan.