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Terra preta ( Portuguese pronunciation: [ˈtɛʁɐ ˈpɾetɐ], literally "black soil" in Portuguese) is a type of very dark, fertile anthropogenic soil ( anthrosol) found in the Amazon Basin. It is also known as "Amazonian dark earth" or "Indian black earth". In Portuguese its full name is terra preta do índio or terra preta de índio ("black ...
The use of soil tests, coupled with the corresponding provisions, can alleviate issues of nutrition and irrigation that can result from non porous Ultisol. Soil tests help indicate the pH, and red clay soil typically has a low pH. The addition of lime is used to help to increase the pH in soil and can help increase the pH in Ultisol as well.
Houston black soil extends over 1,500,000 acres (6,100 km 2) of the Texas blackland prairies and is the Texas state soil. The series is composed of expansive clays and is considered one of the classic vertisols. Houston black soils are used extensively for grain sorghum, cotton, corn, small grain, and
Potassium deficiency, also known as potash deficiency, is a plant disorder that is most common on light, sandy soils, because potassium ions (K +) are highly soluble and will easily leach from soils without colloids. [1] Potassium deficiency is also common in chalky or peaty soils with a low clay content. It is also found on heavy clays with a ...
Geophagia. Silica in the soil that has been eaten by a woman shows up as white on this plain X-ray. Geophagia ( / ˌdʒiːəˈfeɪdʒ ( i) ə / ), also known as geophagy ( / dʒiˈɒfədʒi / ), [1] is the intentional [2] practice of eating earth or soil-like substances such as clay, chalk, or termite mounds. It is a behavioural adaptation that ...
Chernozem (from Ukrainian: чернозем </ref> [1] also called black soil, regur soil or black cotton soil, is a black-colored soil containing a high percentage of humus [2] (4% to 16%) and high percentages of phosphorus and ammonia compounds. [3] Chernozem is very fertile soil and can produce high agricultural yields with its high moisture ...
Calabash ( / ˈkæləbæʃ /; [2] Lagenaria siceraria ), also known as bottle gourd, [3] white-flowered gourd, [4] long melon, birdhouse gourd, [5] New Guinea bean, New Guinea butter bean, Tasmania bean, [6] and opo squash, is a vine grown for its fruit. It can be either harvested young to be consumed as a vegetable, or harvested mature to be ...
Fruits are small and pale. Swede (rutabaga) and turnip - brown or gray concentric rings develop inside the roots. Arecaceae - brown spots on fronds & lower productivity. Soil conditions. Boron is present in the soil in many forms, the most common being boric acid (H 3 BO 3). An adequate amount of boron in the soil is 12 mg/kg.