Centimeter-Precision Guidance of Agricultural Implements in the Open Field by Means of Real Time Kinematic Dgps

Autor: R.P. van Zuydam

Publikováno v: Proceedings of the Fourth International Conference on Precision Agriculture. Wiley
Proceedings of the Fourth International Conference on Precision Agriculture

Multi-year precision guidance of agricultural implements in the open field enables the exact placing of inputs, and to grow crops on predetermined spots. The on-line system proposed here, uses a digital map that contains all co-ordinates to describe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::319e1ac21176e47cd60cbb1865391552
https://doi.org/10.2134/1999.precisionagproc4.c5b

Improved Passive Flux Samplers for Measuring Ammonia Emissions from Animal Houses, Part 1: Basic Principles

Autor: J.M.G. Hol, R. Scholtens, V.R. Phillips, M.J.M. Wagemans

Publikováno v: Biosystems Engineering (2003) 1
Biosystems Engineering, 95-100
ISSUE=1;STARTPAGE=95;ENDPAGE=100;ISSN=15375110;TITLE=Biosystems Engineering

At present, precise, expensive and laborious methods with a high resolution in time are needed, to determine ammonia emission rates from animal houses. The high costs for equipment, maintenance and labour limit the number of sites that can be measure

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a328f9c2fa80ae395de2c43d8b85b634
https://doi.org/10.1016/s1537-5110(03)00020-5

Anaerobic digestion of solid animal waste in an accumulation system at mesophilic and thermophilic conditions, start up

Autor: G.P.A. Bot, W.K.P. van Loon, Grietje Zeeman, Gatze Lettinga, Hamed M. El-Mashad

Publikováno v: Scopus-Elsevier
Proceedings of 3rd international symposium on anaerobic digestion of solid wastes, Garching, Germany, 2002
Water Science and Technology, 48(4), 217-220
Water Science and Technology 48 (2003) 4

The anaerobic digestion of solid animal wastes has been studied in an accumulation system (AC) at a filling time of 60 days followed by about 50 days batch digestion at 40 and 50°C. Poor mixing conditions during anaerobic digestion of solid wastes p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c710c1568aea4756d08aeb1ac1a9df18
https://doi.org/10.2166/wst.2003.0258

Improved passive flux samplers for measuring ammonia emissions from animal houses, Part 2: Performance of different types of sampler as a function of angle of incidence of airflow

Autor: V.R. Phillips, M.J.M. Wagemans, R. Scholtens

Publikováno v: Biosystems Engineering, 227-237
ISSUE=2;STARTPAGE=227;ENDPAGE=237;ISSN=15375110;TITLE=Biosystems Engineering
Biosystems Engineering (2003) 2

The basic principle of the improved passive flux sampler has been reported in a companion paper. In the present paper, the performance of different types of the sampler as a function of angle of incidence of airflow was studied in a wind tunnel. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d7094e844fde8501991a7101e7e9ef0
https://doi.org/10.1016/s1537-5110(03)00016-3

Brain opioid receptor density reflects behavioral and heart rate responses in pigs

Autor: Victor M. Wiegant, Willem G.P. Schouten, L.W.S Loijens, P.R. Wiepkema

Publikováno v: Physiology and Behavior 76 (2002)
Physiology and Behavior, 76, 579-587

Results from our previous research indicate that long-term tether-housed pigs with high and low levels of stereotypies show differences in the density of endogenous opioid receptors in the hippocampus and hypothalamus. It was not clear whether differ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8d9b8207d8c5f7b2454e31e18ebdc67
https://doi.org/10.1016/s0031-9384(02)00729-1