ABSTRACT The objective of this work was to evaluate the productivity and extraction macronutrients by Urochloa brizantha cv. BRS Paiaguás (Syn. Brachiaria Paiaguás) single intercropped with pigeon pea (Cajanus cajan Mandarim), subjected four doses nitrogen applied in topdressing (0, 80, 160 240 kg ha-1). experiment carried out São Luís de Montes Belos, GO, soil classified as dystrophic red lato...

Current approaches to topdressing and weeding operations for rice cultivation present several disadvantages, such as poor precision, low efficiency, serious environmental pollution, so on. This paper presents a row-controlled fertilizing–weeding machine improve the precision of fertilizing reduce heavy pollution associated with cultivation. A proportional–integral–derivative algorithm was adopt...

Within most baseball fields there is a non-turfed basepath surface in addition to a turfed playing surface that can be either natural or synthetic. Two important properties of any playing surface are its ability to absorb the energy generated upon impact (surface hardness) and the level of traction it provides to the athlete during play. Studies were conducted to determine the effects of varyin...

A challenge for Chinese agriculture is to limit the overapplication of nitrogen (N) without reducing grain yield. Roots take up N and participate in N assimilation, facilitating dry matter accumulation in grains. However, little is known about how the root system in soil profile responds to various N supplies. In the present study, N uptake, temporal and spatial distributions of maize roots, an...

Red clover (Trifolium pratense L.) as a dietary supplement is currently used to treat menopausal symptoms because of its high concentrations of mildly estrogenic isoflavone. The application rate of N and P fertilizer has a huge influence on the isoflavone content (IC) in red clover. Trifolium pratense ‘Minshan’ is a unique plant resource in the alpine pasture region of northwest China. It plays...

Abstract. Large quantities of N fertilizers may be lost in rice fields by nitrification-denitrification. In this connection, experiments were carried out in order to compare the effects from slow-release N-fertilizers (ISODUR) and products integrated with diciandiamide (DCD), a nitrification inhibitor, with the N splitting method applied in two or three times on the rice growth and yield. The e...