Monday, May 22, 2006

Improving Conservation in Potato Fields

Deep-rooted cover crops can help potato farmers prevent erosion and protect groundwater by reducing nitrate leaching. That’s one conclusion of Agricultural Research Service (ARS) scientists who developed several important tools and techniques to help growers manage their land economically and responsibly.

Heavily fertilized crops with shallow roots, like potatoes, are more susceptible to nitrate leaching, according to Jorge Delgado, a soil scientist in the ARS Soil Plant Nutrient Research Unit at Fort Collins, Colo. However, nitrogen recovery can be significantly improved--and leaching minimized--by using a deep-rooted cover crop like winter rye, malting barley or winter wheat.

Deep-rooted cover crops reduce wind erosion, sequester carbon, cycle nutrients and draw nitrate further from the soil than crops with shallow roots. Crops like winter cover rye and wheat can even be used for grazing.

Complementary potato research is being conducted in ARS labs at Prosser, Wash., and Orono, Maine.In Prosser, scientists measured how much nitrogen Brassica cover crops contributed to the soil and how much was taken up by subsequent potato crops.

Those studies found that about 30 percent of the nitrogen on the surface of the crop field was cycled back to the soil. Planting Brassica cover crops could save growers $15 to $20 per acre at current fertilizer prices.

Orono researchers modeled the influence of temperature on crop residue decomposition and nitrogen availability in order to predict the best time to apply additional fertilizer to meet the crop’s needs and potentially reduce the amount of nitrate lost to groundwater.These efforts promote "precision conservation," or management practices that incorporate elements of conservation and precision agriculture.

http://www.ars.usda.gov/is/AR/archive/may06/potatoes0506.htm
************************************************************************************

AGRI-INFO/MAY 22, 2006



TITLE: IMPROVING CONSERVATION IN POTATO FIELDS


ALAM BA NINYO NA ANG DEEP ROOTED COVER CROPS AY NAKATUTULONG NG MALAKI SA MGA POTATO FARMER PARA MAIWASAN ANG EROSION NG LUPA AT BIGYAN PROTEKSIYON ANG GROUNDWATER SA PAMAMAGITAN NG PAGBAWAS SA TINATAWAG NA NITRATE LEACHING O PAGKATAGAS NG NITRATE?

NATUKLASAN NG MGA EKSPERTO NA ANG MATINDING ABONO NA IBINIGAY SA MGA TANIM NA MERONG MABABAW NA MGA UGAT TULAD NG PATATAS AY NANGANGANIB SA NITRATE LEACHING.

GAYUNMAN, INIHAYAG NI SOIL SCIENTIST JORGE DELGADO, MAAARING MAISAGAWA ANG NITROGEN RECOVERY AT MAIBSAN ANG PAGKAWALA NG NITRATE SA PAMAMAGITAN NG MGA TANIM NA MALALALIM KUNG MAG-UGAT.

ANG DEEP ROOTED COVER CROPS TULAD NG RYE, BARLEY AT WHEAT AY NAKAKABAWAS SA WIND EROSION, NATITIPON ANG CARBON, NAPAPAKINABANGAN NA MABUTI ANG MGA SUSTANSIYA SA LUPA AT NABABAWI ANG NITRATE SA LUPANG SAKAHAN KESA SA MGA TANIM NA MERON LAMANG MABABAW NA PAG-UGAT.

ANG RYE AT WHEAT AY KARANIWANG MAGAGAMIT NA SA GRAZING.

0 Comments:

Post a Comment

<< Home